You fail to manuover a (ridiculously
overlarge) pram around a tight corner and end up doing some kind of elaborate
three point turn while a queue of other pedestrians build up behind you.

You have no idea that getting (still
ridiculously large) pram on the underground is going to be a problem until you
are standing at the turnstile unable to get the pram through, hearing the
platform attendant telling you to fold it up and knowing that you will never be
able to work out how to do that.

You spend your time thinking “is he too
hot?, is he too cold?, if I put a blanket on he’ll definitely be too hot
though, hang on, is he still breathing?”

It takes you three days to get around to
writing a blog post about being a new parent.